./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:11:38,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:11:38,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:11:38,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:11:38,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:11:38,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:11:38,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:11:38,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:11:38,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:11:38,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:11:38,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:11:38,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:11:38,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:11:38,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:11:38,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:11:38,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:11:38,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:11:38,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:11:38,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:11:38,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:11:38,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:11:38,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:11:38,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:11:38,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:11:38,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:11:38,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:11:38,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:11:38,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:11:38,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:11:38,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:11:38,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:11:38,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:11:38,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:11:38,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:11:38,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:11:38,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:11:38,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:11:38,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:11:38,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:11:38,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:11:38,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:11:38,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:11:38,589 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:11:38,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:11:38,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:11:38,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:11:38,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:11:38,592 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:11:38,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:11:38,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:11:38,593 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:11:38,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:11:38,594 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:11:38,594 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:11:38,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:11:38,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:11:38,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:11:38,595 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:11:38,595 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:11:38,595 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:11:38,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:11:38,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:11:38,596 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:11:38,596 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:11:38,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:11:38,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:11:38,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:11:38,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:11:38,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:11:38,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:11:38,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:11:38,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:11:38,598 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:11:38,599 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:11:38,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:11:38,599 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:11:38,599 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:11:38,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:11:38,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:11:38,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:11:38,936 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:11:38,936 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:11:38,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 07:11:40,061 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:11:40,246 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:11:40,246 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 07:11:40,251 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bd7d19ee/65c1c74aa76d47808ac67ca13c36f9f8/FLAG2d6bf95ef [2023-08-30 07:11:40,261 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bd7d19ee/65c1c74aa76d47808ac67ca13c36f9f8 [2023-08-30 07:11:40,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:11:40,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:11:40,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:11:40,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:11:40,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:11:40,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:11:40" (1/1) ... [2023-08-30 07:11:40,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7f8fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:40, skipping insertion in model container [2023-08-30 07:11:40,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:11:40" (1/1) ... [2023-08-30 07:11:40,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:11:40,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:11:40,462 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 07:11:40,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:11:40,480 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 07:11:40,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a452028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:40, skipping insertion in model container [2023-08-30 07:11:40,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:11:40,483 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:11:40,485 INFO L158 Benchmark]: Toolchain (without parser) took 218.91ms. Allocated memory is still 58.7MB. Free memory was 26.3MB in the beginning and 32.5MB in the end (delta: -6.2MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-08-30 07:11:40,486 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 48.2MB. Free memory was 26.7MB in the beginning and 26.6MB in the end (delta: 54.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:11:40,487 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.85ms. Allocated memory is still 58.7MB. Free memory was 26.2MB in the beginning and 32.6MB in the end (delta: -6.4MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-08-30 07:11:40,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 48.2MB. Free memory was 26.7MB in the beginning and 26.6MB in the end (delta: 54.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.85ms. Allocated memory is still 58.7MB. Free memory was 26.2MB in the beginning and 32.6MB in the end (delta: -6.4MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 125]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:11:42,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:11:42,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:11:42,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:11:42,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:11:42,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:11:42,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:11:42,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:11:42,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:11:42,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:11:42,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:11:42,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:11:42,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:11:42,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:11:42,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:11:42,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:11:42,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:11:42,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:11:42,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:11:42,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:11:42,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:11:42,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:11:42,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:11:42,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:11:42,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:11:42,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:11:42,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:11:42,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:11:42,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:11:42,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:11:42,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:11:42,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:11:42,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:11:42,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:11:42,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:11:42,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:11:42,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:11:42,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:11:42,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:11:42,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:11:42,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:11:42,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:11:42,300 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:11:42,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:11:42,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:11:42,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:11:42,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:11:42,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:11:42,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:11:42,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:11:42,303 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:11:42,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:11:42,304 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:11:42,305 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:11:42,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:11:42,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:11:42,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:11:42,305 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:11:42,305 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:11:42,306 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:11:42,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:11:42,306 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:11:42,306 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:11:42,306 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:11:42,307 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:11:42,307 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:11:42,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:11:42,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:11:42,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:11:42,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:11:42,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:11:42,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:11:42,308 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:11:42,308 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:11:42,309 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:11:42,309 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:11:42,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:11:42,309 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:11:42,309 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:11:42,310 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:11:42,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:11:42,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:11:42,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:11:42,609 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:11:42,609 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:11:42,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 07:11:43,771 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:11:44,006 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:11:44,007 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 07:11:44,012 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1079daa1/847f5748c66d4edfab7157b61a5e09b2/FLAGc847b37c3 [2023-08-30 07:11:44,027 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1079daa1/847f5748c66d4edfab7157b61a5e09b2 [2023-08-30 07:11:44,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:11:44,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:11:44,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:11:44,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:11:44,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:11:44,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cdef6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44, skipping insertion in model container [2023-08-30 07:11:44,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:11:44,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:11:44,261 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 07:11:44,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:11:44,295 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:11:44,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:11:44,327 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 07:11:44,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:11:44,350 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:11:44,382 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-08-30 07:11:44,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:11:44,404 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:11:44,407 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:11:44,413 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:11:44,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44 WrapperNode [2023-08-30 07:11:44,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:11:44,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:11:44,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:11:44,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:11:44,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,475 INFO L138 Inliner]: procedures = 27, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 166 [2023-08-30 07:11:44,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:11:44,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:11:44,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:11:44,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:11:44,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,534 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:11:44,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:11:44,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:11:44,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:11:44,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (1/1) ... [2023-08-30 07:11:44,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:11:44,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:11:44,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 07:11:44,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 07:11:44,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:11:44,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:11:44,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:11:44,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:11:44,614 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:11:44,614 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:11:44,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:11:44,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:11:44,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 07:11:44,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 07:11:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:11:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:11:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:11:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:11:44,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:11:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:11:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:11:44,618 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:11:44,754 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:11:44,756 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:11:45,202 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:11:45,299 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:11:45,300 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 07:11:45,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:11:45 BoogieIcfgContainer [2023-08-30 07:11:45,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:11:45,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:11:45,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:11:45,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:11:45,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:11:44" (1/3) ... [2023-08-30 07:11:45,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327dc970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:11:45, skipping insertion in model container [2023-08-30 07:11:45,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:11:44" (2/3) ... [2023-08-30 07:11:45,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327dc970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:11:45, skipping insertion in model container [2023-08-30 07:11:45,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:11:45" (3/3) ... [2023-08-30 07:11:45,309 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-08-30 07:11:45,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:11:45,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-08-30 07:11:45,323 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:11:45,434 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 07:11:45,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 166 transitions, 356 flow [2023-08-30 07:11:45,554 INFO L130 PetriNetUnfolder]: 11/163 cut-off events. [2023-08-30 07:11:45,554 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:11:45,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 163 events. 11/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 125. Up to 3 conditions per place. [2023-08-30 07:11:45,559 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 166 transitions, 356 flow [2023-08-30 07:11:45,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 159 transitions, 336 flow [2023-08-30 07:11:45,568 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:11:45,578 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 159 transitions, 336 flow [2023-08-30 07:11:45,585 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 159 transitions, 336 flow [2023-08-30 07:11:45,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 159 transitions, 336 flow [2023-08-30 07:11:45,637 INFO L130 PetriNetUnfolder]: 11/159 cut-off events. [2023-08-30 07:11:45,637 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:11:45,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 159 events. 11/159 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 125. Up to 3 conditions per place. [2023-08-30 07:11:45,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 1674 [2023-08-30 07:12:02,661 INFO L134 LiptonReduction]: Checked pairs total: 3569 [2023-08-30 07:12:02,662 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-30 07:12:02,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:12:02,679 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a6a40c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:12:02,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-08-30 07:12:02,682 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:12:02,682 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:12:02,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:02,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:12:02,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:02,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash 21830, now seen corresponding path program 1 times [2023-08-30 07:12:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:02,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942799114] [2023-08-30 07:12:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:02,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:02,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:02,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:02,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 07:12:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:02,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:12:02,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:02,975 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:12:02,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:12:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:03,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:03,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942799114] [2023-08-30 07:12:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942799114] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:03,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:03,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:12:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870894414] [2023-08-30 07:12:03,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:03,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:12:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:12:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:12:03,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-08-30 07:12:03,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:03,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:03,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-08-30 07:12:03,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:03,471 INFO L130 PetriNetUnfolder]: 1210/1759 cut-off events. [2023-08-30 07:12:03,472 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-30 07:12:03,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3563 conditions, 1759 events. 1210/1759 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 8185 event pairs, 878 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 3275. Up to 1698 conditions per place. [2023-08-30 07:12:03,484 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 07:12:03,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 180 flow [2023-08-30 07:12:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:12:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:12:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-30 07:12:03,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45845845845845845 [2023-08-30 07:12:03,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-30 07:12:03,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-30 07:12:03,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:03,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-30 07:12:03,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:03,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:03,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:03,513 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 106 flow. Second operand 3 states and 458 transitions. [2023-08-30 07:12:03,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 180 flow [2023-08-30 07:12:03,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 07:12:03,519 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 92 flow [2023-08-30 07:12:03,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-30 07:12:03,523 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-30 07:12:03,524 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 92 flow [2023-08-30 07:12:03,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:03,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:03,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:12:03,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:03,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:03,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:03,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:03,734 INFO L85 PathProgramCache]: Analyzing trace with hash 21879, now seen corresponding path program 1 times [2023-08-30 07:12:03,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:03,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750982800] [2023-08-30 07:12:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:03,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:03,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:03,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:03,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 07:12:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:03,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:12:03,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:03,872 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2023-08-30 07:12:03,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2023-08-30 07:12:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:03,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:03,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:03,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750982800] [2023-08-30 07:12:03,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750982800] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:03,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:03,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:12:03,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610804798] [2023-08-30 07:12:03,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:03,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:12:03,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:03,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:12:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:12:04,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-08-30 07:12:04,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:04,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:04,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-08-30 07:12:04,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:04,346 INFO L130 PetriNetUnfolder]: 1006/1482 cut-off events. [2023-08-30 07:12:04,347 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 07:12:04,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 1482 events. 1006/1482 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 6794 event pairs, 722 based on Foata normal form. 0/709 useless extension candidates. Maximal degree in co-relation 2944. Up to 1421 conditions per place. [2023-08-30 07:12:04,354 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 07:12:04,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 162 flow [2023-08-30 07:12:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:12:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:12:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-30 07:12:04,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-08-30 07:12:04,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-30 07:12:04,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-30 07:12:04,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:04,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-30 07:12:04,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:04,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:04,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:04,362 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 92 flow. Second operand 3 states and 456 transitions. [2023-08-30 07:12:04,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 162 flow [2023-08-30 07:12:04,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:12:04,364 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 89 flow [2023-08-30 07:12:04,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-30 07:12:04,365 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2023-08-30 07:12:04,365 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 89 flow [2023-08-30 07:12:04,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:04,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:04,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:12:04,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:04,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:04,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:04,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash 21880, now seen corresponding path program 1 times [2023-08-30 07:12:04,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:04,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105676590] [2023-08-30 07:12:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:04,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:04,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:04,578 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:04,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 07:12:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:04,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:12:04,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:04,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:12:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:12:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:12:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:12:04,742 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 07:12:04,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 07:12:04,776 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 07:12:04,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 07:12:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:04,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:04,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:04,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105676590] [2023-08-30 07:12:04,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105676590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:04,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:04,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:12:04,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006814188] [2023-08-30 07:12:04,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:04,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:12:04,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:12:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:12:04,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 07:12:04,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:04,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:04,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 07:12:04,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:05,249 INFO L130 PetriNetUnfolder]: 802/1205 cut-off events. [2023-08-30 07:12:05,249 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 07:12:05,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2397 conditions, 1205 events. 802/1205 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5459 event pairs, 566 based on Foata normal form. 0/613 useless extension candidates. Maximal degree in co-relation 2390. Up to 1144 conditions per place. [2023-08-30 07:12:05,255 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 34 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 07:12:05,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 155 flow [2023-08-30 07:12:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:12:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:12:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-30 07:12:05,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574574574574575 [2023-08-30 07:12:05,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-30 07:12:05,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-30 07:12:05,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:05,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-30 07:12:05,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:05,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:05,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:05,263 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 89 flow. Second operand 3 states and 457 transitions. [2023-08-30 07:12:05,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 155 flow [2023-08-30 07:12:05,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:12:05,264 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 86 flow [2023-08-30 07:12:05,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-30 07:12:05,265 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2023-08-30 07:12:05,265 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 86 flow [2023-08-30 07:12:05,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:05,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:05,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:12:05,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:05,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:05,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash 21831, now seen corresponding path program 1 times [2023-08-30 07:12:05,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:05,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674311536] [2023-08-30 07:12:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:05,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:05,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:05,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 07:12:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:12:05,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:05,637 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:12:05,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:12:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:05,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:05,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:05,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674311536] [2023-08-30 07:12:05,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674311536] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:05,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:05,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:12:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873872664] [2023-08-30 07:12:05,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:05,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:12:05,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:12:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:12:05,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-08-30 07:12:05,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:05,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:05,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-08-30 07:12:05,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:06,210 INFO L130 PetriNetUnfolder]: 1603/2408 cut-off events. [2023-08-30 07:12:06,211 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 07:12:06,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 2408 events. 1603/2408 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 12635 event pairs, 1132 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 4778. Up to 1145 conditions per place. [2023-08-30 07:12:06,224 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 66 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-30 07:12:06,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 294 flow [2023-08-30 07:12:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:12:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:12:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-30 07:12:06,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-08-30 07:12:06,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-30 07:12:06,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-30 07:12:06,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:06,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-30 07:12:06,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:06,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:06,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:06,231 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 86 flow. Second operand 3 states and 486 transitions. [2023-08-30 07:12:06,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 294 flow [2023-08-30 07:12:06,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:12:06,233 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 97 flow [2023-08-30 07:12:06,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-30 07:12:06,234 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-30 07:12:06,234 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 97 flow [2023-08-30 07:12:06,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:06,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:06,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:12:06,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:06,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:06,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:06,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:06,445 INFO L85 PathProgramCache]: Analyzing trace with hash 678535, now seen corresponding path program 1 times [2023-08-30 07:12:06,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:06,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487745957] [2023-08-30 07:12:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:06,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:06,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:06,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:06,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:12:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:06,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:12:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:06,631 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:12:06,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:12:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:06,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:06,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:06,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487745957] [2023-08-30 07:12:06,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487745957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:06,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:12:06,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:12:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832953790] [2023-08-30 07:12:06,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:06,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:12:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:12:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:12:07,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 07:12:07,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 97 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:07,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:07,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 07:12:07,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:08,171 INFO L130 PetriNetUnfolder]: 2406/3615 cut-off events. [2023-08-30 07:12:08,172 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 07:12:08,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 3615 events. 2406/3615 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 20328 event pairs, 1698 based on Foata normal form. 0/1850 useless extension candidates. Maximal degree in co-relation 7181. Up to 1144 conditions per place. [2023-08-30 07:12:08,191 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 98 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2023-08-30 07:12:08,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 108 transitions, 463 flow [2023-08-30 07:12:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:12:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:12:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 912 transitions. [2023-08-30 07:12:08,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-08-30 07:12:08,206 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 912 transitions. [2023-08-30 07:12:08,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 912 transitions. [2023-08-30 07:12:08,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:08,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 912 transitions. [2023-08-30 07:12:08,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.0) internal successors, (912), 6 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:08,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:08,213 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:08,213 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 97 flow. Second operand 6 states and 912 transitions. [2023-08-30 07:12:08,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 108 transitions, 463 flow [2023-08-30 07:12:08,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 108 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:12:08,216 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 149 flow [2023-08-30 07:12:08,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-30 07:12:08,216 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-30 07:12:08,217 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 149 flow [2023-08-30 07:12:08,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:08,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:08,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:12:08,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:08,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:08,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:08,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash 21043134, now seen corresponding path program 1 times [2023-08-30 07:12:08,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:08,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11770159] [2023-08-30 07:12:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:08,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:08,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:08,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:08,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:12:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:08,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:12:08,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:08,552 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2023-08-30 07:12:08,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2023-08-30 07:12:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:08,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:08,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:08,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11770159] [2023-08-30 07:12:08,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11770159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:08,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:08,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:12:08,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304625314] [2023-08-30 07:12:08,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:08,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:12:08,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:08,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:12:08,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:12:08,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 07:12:08,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:08,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:08,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 07:12:08,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:09,104 INFO L130 PetriNetUnfolder]: 2334/3489 cut-off events. [2023-08-30 07:12:09,104 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 07:12:09,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6964 conditions, 3489 events. 2334/3489 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 19458 event pairs, 1638 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 6949. Up to 3306 conditions per place. [2023-08-30 07:12:09,131 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-30 07:12:09,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 223 flow [2023-08-30 07:12:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:12:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:12:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-30 07:12:09,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44344344344344344 [2023-08-30 07:12:09,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-30 07:12:09,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-30 07:12:09,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:09,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-30 07:12:09,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:09,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:09,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:09,139 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 149 flow. Second operand 3 states and 443 transitions. [2023-08-30 07:12:09,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 223 flow [2023-08-30 07:12:09,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 213 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:12:09,142 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 137 flow [2023-08-30 07:12:09,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-30 07:12:09,143 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-30 07:12:09,143 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 137 flow [2023-08-30 07:12:09,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:09,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:09,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:12:09,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:09,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:09,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:09,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash 21043135, now seen corresponding path program 1 times [2023-08-30 07:12:09,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:09,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222658210] [2023-08-30 07:12:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:09,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:09,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:09,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:09,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 07:12:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:12:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:12:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:12:09,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:12:09,515 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 07:12:09,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 07:12:09,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 07:12:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:09,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:09,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222658210] [2023-08-30 07:12:09,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222658210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:09,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:09,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:12:09,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166505304] [2023-08-30 07:12:09,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:09,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:12:09,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:12:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:12:09,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 07:12:09,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:09,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:09,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 07:12:09,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:10,096 INFO L130 PetriNetUnfolder]: 2262/3363 cut-off events. [2023-08-30 07:12:10,096 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-08-30 07:12:10,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6709 conditions, 3363 events. 2262/3363 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 18583 event pairs, 1578 based on Foata normal form. 0/1773 useless extension candidates. Maximal degree in co-relation 6693. Up to 3180 conditions per place. [2023-08-30 07:12:10,119 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 07:12:10,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 207 flow [2023-08-30 07:12:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:12:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:12:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-30 07:12:10,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345345345345345 [2023-08-30 07:12:10,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-30 07:12:10,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-30 07:12:10,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:10,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-30 07:12:10,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,127 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 137 flow. Second operand 3 states and 453 transitions. [2023-08-30 07:12:10,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 207 flow [2023-08-30 07:12:10,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:12:10,131 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 134 flow [2023-08-30 07:12:10,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-30 07:12:10,132 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-30 07:12:10,132 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 134 flow [2023-08-30 07:12:10,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:10,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:12:10,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:10,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:10,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash 652332668, now seen corresponding path program 1 times [2023-08-30 07:12:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:10,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97308296] [2023-08-30 07:12:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:10,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:10,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:10,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:10,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:12:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:10,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:12:10,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:10,470 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:12:10,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:12:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:10,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:10,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:10,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97308296] [2023-08-30 07:12:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97308296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:10,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:12:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24194485] [2023-08-30 07:12:10,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:10,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:12:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:10,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:12:10,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:12:10,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 07:12:10,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:10,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 07:12:10,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:10,956 INFO L130 PetriNetUnfolder]: 1524/2328 cut-off events. [2023-08-30 07:12:10,956 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 07:12:10,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 2328 events. 1524/2328 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 12335 event pairs, 1074 based on Foata normal form. 0/1401 useless extension candidates. Maximal degree in co-relation 4617. Up to 2168 conditions per place. [2023-08-30 07:12:10,968 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-08-30 07:12:10,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 200 flow [2023-08-30 07:12:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:12:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:12:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-30 07:12:10,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346846846846847 [2023-08-30 07:12:10,971 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-30 07:12:10,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-30 07:12:10,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:10,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-30 07:12:10,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,975 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,975 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 134 flow. Second operand 4 states and 579 transitions. [2023-08-30 07:12:10,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 200 flow [2023-08-30 07:12:10,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:12:10,978 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 137 flow [2023-08-30 07:12:10,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-30 07:12:10,980 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-30 07:12:10,980 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 137 flow [2023-08-30 07:12:10,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:10,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:10,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:12:10,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:11,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:11,190 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:11,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash 652332669, now seen corresponding path program 1 times [2023-08-30 07:12:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:11,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840708323] [2023-08-30 07:12:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:11,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:11,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:11,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:11,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 07:12:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:11,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:12:11,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:11,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:11,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:11,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840708323] [2023-08-30 07:12:11,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840708323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:11,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:11,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:12:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747782803] [2023-08-30 07:12:11,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:11,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:12:11,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:11,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:12:11,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:12:11,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 07:12:11,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:11,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:11,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 07:12:11,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:11,659 INFO L130 PetriNetUnfolder]: 1136/1776 cut-off events. [2023-08-30 07:12:11,659 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 07:12:11,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3568 conditions, 1776 events. 1136/1776 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 9229 event pairs, 835 based on Foata normal form. 26/1137 useless extension candidates. Maximal degree in co-relation 3550. Up to 1453 conditions per place. [2023-08-30 07:12:11,668 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 54 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-30 07:12:11,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 307 flow [2023-08-30 07:12:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:12:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:12:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-08-30 07:12:11,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624624624624625 [2023-08-30 07:12:11,671 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-08-30 07:12:11,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-08-30 07:12:11,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:11,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-08-30 07:12:11,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:11,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:11,675 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:11,676 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 137 flow. Second operand 4 states and 616 transitions. [2023-08-30 07:12:11,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 307 flow [2023-08-30 07:12:11,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:12:11,677 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 159 flow [2023-08-30 07:12:11,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-30 07:12:11,678 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-30 07:12:11,678 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 159 flow [2023-08-30 07:12:11,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:11,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:11,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:12:11,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:11,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:11,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:11,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:11,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1258634947, now seen corresponding path program 1 times [2023-08-30 07:12:11,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:11,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264442623] [2023-08-30 07:12:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:11,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:11,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:11,890 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:11,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 07:12:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:12:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:12,055 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:12:12,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:12:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:12,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:12,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:12,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264442623] [2023-08-30 07:12:12,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264442623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:12,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:12:12,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:12:12,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208577270] [2023-08-30 07:12:12,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:12,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:12:12,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:12,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:12:12,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:12:14,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 07:12:14,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 131.25) internal successors, (1050), 8 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:14,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:14,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 07:12:14,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:18,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:12:20,015 INFO L130 PetriNetUnfolder]: 1246/1986 cut-off events. [2023-08-30 07:12:20,015 INFO L131 PetriNetUnfolder]: For 351/351 co-relation queries the response was YES. [2023-08-30 07:12:20,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4329 conditions, 1986 events. 1246/1986 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10299 event pairs, 921 based on Foata normal form. 134/1684 useless extension candidates. Maximal degree in co-relation 4309. Up to 722 conditions per place. [2023-08-30 07:12:20,023 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 93 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2023-08-30 07:12:20,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 107 transitions, 536 flow [2023-08-30 07:12:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:12:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:12:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1408 transitions. [2023-08-30 07:12:20,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228228228228228 [2023-08-30 07:12:20,029 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1408 transitions. [2023-08-30 07:12:20,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1408 transitions. [2023-08-30 07:12:20,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:20,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1408 transitions. [2023-08-30 07:12:20,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.8) internal successors, (1408), 10 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:20,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:20,037 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:20,037 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 159 flow. Second operand 10 states and 1408 transitions. [2023-08-30 07:12:20,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 107 transitions, 536 flow [2023-08-30 07:12:20,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 107 transitions, 526 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:12:20,040 INFO L231 Difference]: Finished difference. Result has 63 places, 40 transitions, 191 flow [2023-08-30 07:12:20,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=191, PETRI_PLACES=63, PETRI_TRANSITIONS=40} [2023-08-30 07:12:20,041 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-08-30 07:12:20,041 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 40 transitions, 191 flow [2023-08-30 07:12:20,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.25) internal successors, (1050), 8 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:20,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:20,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:12:20,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:20,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:20,242 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:20,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:20,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1252367159, now seen corresponding path program 1 times [2023-08-30 07:12:20,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:20,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334977568] [2023-08-30 07:12:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:20,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:20,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:20,244 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:20,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 07:12:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:20,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:12:20,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:20,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:12:20,414 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 07:12:20,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-30 07:12:20,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2023-08-30 07:12:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:20,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:20,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334977568] [2023-08-30 07:12:20,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334977568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:20,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:20,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:12:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758292066] [2023-08-30 07:12:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:12:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:12:20,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:12:20,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 07:12:20,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 40 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:20,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:20,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 07:12:20,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:20,848 INFO L130 PetriNetUnfolder]: 1098/1751 cut-off events. [2023-08-30 07:12:20,848 INFO L131 PetriNetUnfolder]: For 661/661 co-relation queries the response was YES. [2023-08-30 07:12:20,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4076 conditions, 1751 events. 1098/1751 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9031 event pairs, 817 based on Foata normal form. 0/1458 useless extension candidates. Maximal degree in co-relation 4054. Up to 1643 conditions per place. [2023-08-30 07:12:20,858 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 34 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 07:12:20,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 38 transitions, 257 flow [2023-08-30 07:12:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:12:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:12:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-30 07:12:20,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494494494494494 [2023-08-30 07:12:20,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-30 07:12:20,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-30 07:12:20,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:20,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-30 07:12:20,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:20,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:20,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:20,865 INFO L175 Difference]: Start difference. First operand has 63 places, 40 transitions, 191 flow. Second operand 3 states and 449 transitions. [2023-08-30 07:12:20,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 38 transitions, 257 flow [2023-08-30 07:12:20,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 38 transitions, 207 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-08-30 07:12:20,868 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 139 flow [2023-08-30 07:12:20,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-30 07:12:20,869 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-30 07:12:20,869 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 139 flow [2023-08-30 07:12:20,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:20,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:20,869 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:12:20,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:21,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:21,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:21,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1258838713, now seen corresponding path program 2 times [2023-08-30 07:12:21,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:21,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153843810] [2023-08-30 07:12:21,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:12:21,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:21,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:21,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 07:12:21,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:12:21,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:12:21,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:21,269 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:12:21,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:12:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:21,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:22,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:22,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153843810] [2023-08-30 07:12:22,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153843810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:22,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:12:22,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:12:22,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14732480] [2023-08-30 07:12:22,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:22,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:12:22,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:22,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:12:22,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:12:24,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 07:12:24,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 139 flow. Second operand has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:24,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:24,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 07:12:24,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:28,599 INFO L130 PetriNetUnfolder]: 3600/5590 cut-off events. [2023-08-30 07:12:28,599 INFO L131 PetriNetUnfolder]: For 3767/3767 co-relation queries the response was YES. [2023-08-30 07:12:28,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13810 conditions, 5590 events. 3600/5590 cut-off events. For 3767/3767 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32688 event pairs, 2599 based on Foata normal form. 6/4730 useless extension candidates. Maximal degree in co-relation 13792. Up to 1315 conditions per place. [2023-08-30 07:12:28,628 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 232 selfloop transitions, 12 changer transitions 0/247 dead transitions. [2023-08-30 07:12:28,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 247 transitions, 1239 flow [2023-08-30 07:12:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:12:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:12:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1870 transitions. [2023-08-30 07:12:28,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46796796796796797 [2023-08-30 07:12:28,635 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1870 transitions. [2023-08-30 07:12:28,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1870 transitions. [2023-08-30 07:12:28,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:28,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1870 transitions. [2023-08-30 07:12:28,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 155.83333333333334) internal successors, (1870), 12 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:28,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:28,646 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:28,646 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 139 flow. Second operand 12 states and 1870 transitions. [2023-08-30 07:12:28,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 247 transitions, 1239 flow [2023-08-30 07:12:28,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 247 transitions, 1238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:12:28,654 INFO L231 Difference]: Finished difference. Result has 71 places, 45 transitions, 236 flow [2023-08-30 07:12:28,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=236, PETRI_PLACES=71, PETRI_TRANSITIONS=45} [2023-08-30 07:12:28,654 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-08-30 07:12:28,655 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 45 transitions, 236 flow [2023-08-30 07:12:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:28,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:28,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:12:28,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:28,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:28,868 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:28,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1252367158, now seen corresponding path program 1 times [2023-08-30 07:12:28,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:28,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030170751] [2023-08-30 07:12:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:28,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:28,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:28,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:28,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 07:12:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:28,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:12:28,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:28,999 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 07:12:29,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 07:12:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:29,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:29,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:29,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030170751] [2023-08-30 07:12:29,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030170751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:29,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:29,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:12:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129683272] [2023-08-30 07:12:29,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:29,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:12:29,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:12:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:12:29,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 07:12:29,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 45 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:29,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:29,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 07:12:29,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:29,529 INFO L130 PetriNetUnfolder]: 3236/5083 cut-off events. [2023-08-30 07:12:29,529 INFO L131 PetriNetUnfolder]: For 2799/2799 co-relation queries the response was YES. [2023-08-30 07:12:29,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12313 conditions, 5083 events. 3236/5083 cut-off events. For 2799/2799 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29775 event pairs, 2265 based on Foata normal form. 0/4516 useless extension candidates. Maximal degree in co-relation 12287. Up to 4569 conditions per place. [2023-08-30 07:12:29,549 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 07:12:29,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 43 transitions, 312 flow [2023-08-30 07:12:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:12:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:12:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-30 07:12:29,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43543543543543545 [2023-08-30 07:12:29,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-30 07:12:29,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-30 07:12:29,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:29,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-30 07:12:29,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:29,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:29,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:29,556 INFO L175 Difference]: Start difference. First operand has 71 places, 45 transitions, 236 flow. Second operand 3 states and 435 transitions. [2023-08-30 07:12:29,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 43 transitions, 312 flow [2023-08-30 07:12:29,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 43 transitions, 290 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 07:12:29,560 INFO L231 Difference]: Finished difference. Result has 67 places, 43 transitions, 212 flow [2023-08-30 07:12:29,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2023-08-30 07:12:29,561 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-08-30 07:12:29,562 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 212 flow [2023-08-30 07:12:29,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:29,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:29,562 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-30 07:12:29,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:29,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:29,772 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:29,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:29,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1592295037, now seen corresponding path program 2 times [2023-08-30 07:12:29,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:29,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450489549] [2023-08-30 07:12:29,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:12:29,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:29,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:29,775 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 07:12:29,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:12:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:29,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:12:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:29,967 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:12:29,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:12:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:12:30,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:12:30,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:30,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450489549] [2023-08-30 07:12:30,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450489549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:12:30,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:12:30,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:12:30,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715913176] [2023-08-30 07:12:30,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:12:30,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:12:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:30,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:12:30,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:12:30,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 07:12:30,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:30,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:30,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 07:12:30,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:12:30,637 INFO L130 PetriNetUnfolder]: 2072/3372 cut-off events. [2023-08-30 07:12:30,637 INFO L131 PetriNetUnfolder]: For 2544/2544 co-relation queries the response was YES. [2023-08-30 07:12:30,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7050 conditions, 3372 events. 2072/3372 cut-off events. For 2544/2544 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18839 event pairs, 1469 based on Foata normal form. 468/3403 useless extension candidates. Maximal degree in co-relation 7023. Up to 2966 conditions per place. [2023-08-30 07:12:30,651 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 31 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2023-08-30 07:12:30,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 41 transitions, 272 flow [2023-08-30 07:12:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:12:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:12:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2023-08-30 07:12:30,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4271771771771772 [2023-08-30 07:12:30,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 569 transitions. [2023-08-30 07:12:30,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 569 transitions. [2023-08-30 07:12:30,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:12:30,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 569 transitions. [2023-08-30 07:12:30,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:30,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:30,658 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:30,658 INFO L175 Difference]: Start difference. First operand has 67 places, 43 transitions, 212 flow. Second operand 4 states and 569 transitions. [2023-08-30 07:12:30,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 41 transitions, 272 flow [2023-08-30 07:12:30,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 41 transitions, 268 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 07:12:30,661 INFO L231 Difference]: Finished difference. Result has 65 places, 41 transitions, 206 flow [2023-08-30 07:12:30,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=65, PETRI_TRANSITIONS=41} [2023-08-30 07:12:30,661 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-08-30 07:12:30,662 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 41 transitions, 206 flow [2023-08-30 07:12:30,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:30,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:30,662 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:12:30,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:30,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:30,871 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:12:30,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash 668966215, now seen corresponding path program 3 times [2023-08-30 07:12:30,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:12:30,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463534850] [2023-08-30 07:12:30,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:12:30,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:12:30,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:12:30,877 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:12:30,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 07:12:31,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:12:31,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:31,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:12:31,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:12:31,160 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:12:31,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:12:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:31,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:12:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:33,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:12:33,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463534850] [2023-08-30 07:12:33,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463534850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:12:33,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:12:33,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:12:33,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163659636] [2023-08-30 07:12:33,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:12:33,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:12:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:12:33,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:12:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:12:45,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 07:12:45,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 41 transitions, 206 flow. Second operand has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:45,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:12:45,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 07:12:45,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:02,494 INFO L130 PetriNetUnfolder]: 5030/8053 cut-off events. [2023-08-30 07:13:02,494 INFO L131 PetriNetUnfolder]: For 1337/1337 co-relation queries the response was YES. [2023-08-30 07:13:02,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17348 conditions, 8053 events. 5030/8053 cut-off events. For 1337/1337 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 46969 event pairs, 3705 based on Foata normal form. 12/6973 useless extension candidates. Maximal degree in co-relation 17322. Up to 1135 conditions per place. [2023-08-30 07:13:02,529 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 439 selfloop transitions, 24 changer transitions 1/467 dead transitions. [2023-08-30 07:13:02,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 467 transitions, 2400 flow [2023-08-30 07:13:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:13:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:13:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3716 transitions. [2023-08-30 07:13:02,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464964964964965 [2023-08-30 07:13:02,540 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3716 transitions. [2023-08-30 07:13:02,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3716 transitions. [2023-08-30 07:13:02,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:02,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3716 transitions. [2023-08-30 07:13:02,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 154.83333333333334) internal successors, (3716), 24 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:02,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:02,575 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:02,576 INFO L175 Difference]: Start difference. First operand has 65 places, 41 transitions, 206 flow. Second operand 24 states and 3716 transitions. [2023-08-30 07:13:02,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 467 transitions, 2400 flow [2023-08-30 07:13:02,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 467 transitions, 2375 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:13:02,584 INFO L231 Difference]: Finished difference. Result has 99 places, 54 transitions, 385 flow [2023-08-30 07:13:02,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=385, PETRI_PLACES=99, PETRI_TRANSITIONS=54} [2023-08-30 07:13:02,585 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2023-08-30 07:13:02,585 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 54 transitions, 385 flow [2023-08-30 07:13:02,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:02,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:02,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:02,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:02,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:13:02,797 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:13:02,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2035185124, now seen corresponding path program 1 times [2023-08-30 07:13:02,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:13:02,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201097563] [2023-08-30 07:13:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:13:02,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:13:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:13:02,799 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:13:02,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 07:13:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:13:02,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:02,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:13:02,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:13:02,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201097563] [2023-08-30 07:13:02,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201097563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:13:02,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:13:02,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:13:02,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353578621] [2023-08-30 07:13:02,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:13:02,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:13:02,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:13:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:13:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:13:02,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 07:13:02,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 54 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:02,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:02,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 07:13:02,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:03,761 INFO L130 PetriNetUnfolder]: 5044/8395 cut-off events. [2023-08-30 07:13:03,761 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2023-08-30 07:13:03,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18145 conditions, 8395 events. 5044/8395 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 53403 event pairs, 304 based on Foata normal form. 610/7894 useless extension candidates. Maximal degree in co-relation 18106. Up to 2744 conditions per place. [2023-08-30 07:13:03,795 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 73 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-08-30 07:13:03,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 80 transitions, 607 flow [2023-08-30 07:13:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:13:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:13:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-08-30 07:13:03,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45165165165165166 [2023-08-30 07:13:03,798 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-08-30 07:13:03,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-08-30 07:13:03,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:03,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-08-30 07:13:03,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:03,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:03,802 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:03,803 INFO L175 Difference]: Start difference. First operand has 99 places, 54 transitions, 385 flow. Second operand 5 states and 752 transitions. [2023-08-30 07:13:03,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 80 transitions, 607 flow [2023-08-30 07:13:03,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 556 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-30 07:13:03,809 INFO L231 Difference]: Finished difference. Result has 95 places, 57 transitions, 365 flow [2023-08-30 07:13:03,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=365, PETRI_PLACES=95, PETRI_TRANSITIONS=57} [2023-08-30 07:13:03,810 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2023-08-30 07:13:03,810 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 57 transitions, 365 flow [2023-08-30 07:13:03,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:03,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:03,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:03,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:04,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:13:04,019 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:13:04,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:04,020 INFO L85 PathProgramCache]: Analyzing trace with hash 936620446, now seen corresponding path program 2 times [2023-08-30 07:13:04,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:13:04,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499447572] [2023-08-30 07:13:04,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:13:04,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:13:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:13:04,022 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:13:04,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 07:13:04,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:13:04,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:13:04,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:13:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:04,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:13:04,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:13:04,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499447572] [2023-08-30 07:13:04,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499447572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:13:04,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:13:04,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:13:04,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408589744] [2023-08-30 07:13:04,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:13:04,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:13:04,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:13:04,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:13:04,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:13:04,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 07:13:04,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 57 transitions, 365 flow. Second operand has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:04,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:04,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 07:13:04,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:05,964 INFO L130 PetriNetUnfolder]: 10639/16343 cut-off events. [2023-08-30 07:13:05,964 INFO L131 PetriNetUnfolder]: For 5532/5532 co-relation queries the response was YES. [2023-08-30 07:13:06,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40490 conditions, 16343 events. 10639/16343 cut-off events. For 5532/5532 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 102560 event pairs, 739 based on Foata normal form. 408/14414 useless extension candidates. Maximal degree in co-relation 40447. Up to 5960 conditions per place. [2023-08-30 07:13:06,030 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 77 selfloop transitions, 11 changer transitions 5/94 dead transitions. [2023-08-30 07:13:06,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 653 flow [2023-08-30 07:13:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:13:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:13:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1017 transitions. [2023-08-30 07:13:06,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362934362934363 [2023-08-30 07:13:06,035 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1017 transitions. [2023-08-30 07:13:06,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1017 transitions. [2023-08-30 07:13:06,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:06,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1017 transitions. [2023-08-30 07:13:06,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 145.28571428571428) internal successors, (1017), 7 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:06,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:06,040 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:06,040 INFO L175 Difference]: Start difference. First operand has 95 places, 57 transitions, 365 flow. Second operand 7 states and 1017 transitions. [2023-08-30 07:13:06,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 653 flow [2023-08-30 07:13:06,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 649 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:13:06,046 INFO L231 Difference]: Finished difference. Result has 102 places, 55 transitions, 381 flow [2023-08-30 07:13:06,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=102, PETRI_TRANSITIONS=55} [2023-08-30 07:13:06,047 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2023-08-30 07:13:06,047 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 55 transitions, 381 flow [2023-08-30 07:13:06,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:06,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:06,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:13:06,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:06,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:13:06,255 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:13:06,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:06,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1631084858, now seen corresponding path program 1 times [2023-08-30 07:13:06,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:13:06,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110054144] [2023-08-30 07:13:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:13:06,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:13:06,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:13:06,257 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:13:06,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 07:13:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:13:06,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:13:06,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:13:06,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:13:06,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:13:06,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110054144] [2023-08-30 07:13:06,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110054144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:13:06,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:13:06,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:13:06,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460177937] [2023-08-30 07:13:06,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:13:06,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:13:06,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:13:06,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:13:06,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:13:06,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 333 [2023-08-30 07:13:06,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 55 transitions, 381 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:06,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:06,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 333 [2023-08-30 07:13:06,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:13:07,318 INFO L130 PetriNetUnfolder]: 4083/7667 cut-off events. [2023-08-30 07:13:07,319 INFO L131 PetriNetUnfolder]: For 11273/11273 co-relation queries the response was YES. [2023-08-30 07:13:07,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21818 conditions, 7667 events. 4083/7667 cut-off events. For 11273/11273 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 53361 event pairs, 1740 based on Foata normal form. 280/7067 useless extension candidates. Maximal degree in co-relation 21772. Up to 5261 conditions per place. [2023-08-30 07:13:07,376 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 56 selfloop transitions, 2 changer transitions 3/66 dead transitions. [2023-08-30 07:13:07,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 66 transitions, 537 flow [2023-08-30 07:13:07,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:13:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:13:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 07:13:07,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146146146146144 [2023-08-30 07:13:07,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 07:13:07,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 07:13:07,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:13:07,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 07:13:07,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:07,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:07,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:07,381 INFO L175 Difference]: Start difference. First operand has 102 places, 55 transitions, 381 flow. Second operand 3 states and 461 transitions. [2023-08-30 07:13:07,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 66 transitions, 537 flow [2023-08-30 07:13:07,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 66 transitions, 505 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 07:13:07,421 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 367 flow [2023-08-30 07:13:07,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2023-08-30 07:13:07,422 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2023-08-30 07:13:07,422 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 367 flow [2023-08-30 07:13:07,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:07,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:13:07,423 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 07:13:07,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:13:07,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:13:07,632 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:13:07,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:13:07,633 INFO L85 PathProgramCache]: Analyzing trace with hash -643723961, now seen corresponding path program 4 times [2023-08-30 07:13:07,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:13:07,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326736973] [2023-08-30 07:13:07,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:13:07,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:13:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:13:07,634 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:13:07,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:13:07,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:13:07,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:13:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 07:13:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:07,944 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:13:07,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:13:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:09,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:13:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:13:18,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:13:18,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326736973] [2023-08-30 07:13:18,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326736973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:13:18,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:13:18,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 07:13:18,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32378660] [2023-08-30 07:13:18,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:13:18,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 07:13:18,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:13:18,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 07:13:18,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 07:14:18,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-08-30 07:14:18,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 367 flow. Second operand has 48 states, 48 states have (on average 136.0) internal successors, (6528), 48 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:14:18,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:14:18,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-08-30 07:14:18,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:14:42,190 WARN L222 SmtUtils]: Spent 15.92s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:14:57,572 WARN L222 SmtUtils]: Spent 13.64s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:15:10,394 WARN L222 SmtUtils]: Spent 11.32s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:15:20,561 WARN L222 SmtUtils]: Spent 8.54s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:15:32,537 WARN L222 SmtUtils]: Spent 10.38s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:15:41,335 WARN L222 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:15:50,418 WARN L222 SmtUtils]: Spent 7.27s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:15:58,714 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:16:46,022 INFO L130 PetriNetUnfolder]: 9182/17240 cut-off events. [2023-08-30 07:16:46,022 INFO L131 PetriNetUnfolder]: For 22077/22077 co-relation queries the response was YES. [2023-08-30 07:16:46,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47762 conditions, 17240 events. 9182/17240 cut-off events. For 22077/22077 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 124062 event pairs, 7110 based on Foata normal form. 24/15408 useless extension candidates. Maximal degree in co-relation 47718. Up to 3691 conditions per place. [2023-08-30 07:16:46,149 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 947 selfloop transitions, 48 changer transitions 0/1000 dead transitions. [2023-08-30 07:16:46,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 1000 transitions, 6094 flow [2023-08-30 07:16:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 07:16:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 07:16:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7454 transitions. [2023-08-30 07:16:46,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634134134134136 [2023-08-30 07:16:46,268 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7454 transitions. [2023-08-30 07:16:46,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7454 transitions. [2023-08-30 07:16:46,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:46,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7454 transitions. [2023-08-30 07:16:46,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 155.29166666666666) internal successors, (7454), 48 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:46,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 333.0) internal successors, (16317), 49 states have internal predecessors, (16317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:46,296 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 333.0) internal successors, (16317), 49 states have internal predecessors, (16317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:46,296 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 367 flow. Second operand 48 states and 7454 transitions. [2023-08-30 07:16:46,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 1000 transitions, 6094 flow [2023-08-30 07:16:46,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 1000 transitions, 5778 flow, removed 135 selfloop flow, removed 2 redundant places. [2023-08-30 07:16:46,418 INFO L231 Difference]: Finished difference. Result has 165 places, 81 transitions, 717 flow [2023-08-30 07:16:46,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=717, PETRI_PLACES=165, PETRI_TRANSITIONS=81} [2023-08-30 07:16:46,419 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2023-08-30 07:16:46,420 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 81 transitions, 717 flow [2023-08-30 07:16:46,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 136.0) internal successors, (6528), 48 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:46,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:46,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:16:46,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 07:16:46,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:46,633 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:16:46,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:46,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1027074895, now seen corresponding path program 1 times [2023-08-30 07:16:46,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:46,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542080346] [2023-08-30 07:16:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:46,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:46,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:46,635 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:46,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:16:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:46,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:16:46,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:16:47,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:47,524 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:16:47,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 70 [2023-08-30 07:16:53,829 WARN L222 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 98 DAG size of output: 23 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:16:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:16:54,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:54,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542080346] [2023-08-30 07:16:54,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542080346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:54,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:16:54,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 07:16:54,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508738217] [2023-08-30 07:16:54,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:54,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 07:16:54,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 07:16:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-30 07:16:56,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 333 [2023-08-30 07:16:56,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 81 transitions, 717 flow. Second operand has 20 states, 20 states have (on average 122.2) internal successors, (2444), 20 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:56,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:56,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 333 [2023-08-30 07:16:56,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:07,700 INFO L130 PetriNetUnfolder]: 29972/50810 cut-off events. [2023-08-30 07:17:07,701 INFO L131 PetriNetUnfolder]: For 28029/28029 co-relation queries the response was YES. [2023-08-30 07:17:08,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134128 conditions, 50810 events. 29972/50810 cut-off events. For 28029/28029 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 377069 event pairs, 540 based on Foata normal form. 1080/47705 useless extension candidates. Maximal degree in co-relation 134059. Up to 11295 conditions per place. [2023-08-30 07:17:08,410 INFO L137 encePairwiseOnDemand]: 319/333 looper letters, 196 selfloop transitions, 55 changer transitions 12/263 dead transitions. [2023-08-30 07:17:08,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 263 transitions, 1764 flow [2023-08-30 07:17:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 07:17:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 07:17:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3451 transitions. [2023-08-30 07:17:08,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38382827271716163 [2023-08-30 07:17:08,414 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3451 transitions. [2023-08-30 07:17:08,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3451 transitions. [2023-08-30 07:17:08,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:08,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3451 transitions. [2023-08-30 07:17:08,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 127.81481481481481) internal successors, (3451), 27 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:08,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 333.0) internal successors, (9324), 28 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:08,427 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 333.0) internal successors, (9324), 28 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:08,427 INFO L175 Difference]: Start difference. First operand has 165 places, 81 transitions, 717 flow. Second operand 27 states and 3451 transitions. [2023-08-30 07:17:08,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 263 transitions, 1764 flow [2023-08-30 07:17:08,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 263 transitions, 1668 flow, removed 25 selfloop flow, removed 22 redundant places. [2023-08-30 07:17:08,597 INFO L231 Difference]: Finished difference. Result has 180 places, 129 transitions, 990 flow [2023-08-30 07:17:08,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=990, PETRI_PLACES=180, PETRI_TRANSITIONS=129} [2023-08-30 07:17:08,598 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 129 predicate places. [2023-08-30 07:17:08,598 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 129 transitions, 990 flow [2023-08-30 07:17:08,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 122.2) internal successors, (2444), 20 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:08,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:08,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:08,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:08,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:08,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:17:08,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2064249089, now seen corresponding path program 2 times [2023-08-30 07:17:08,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:08,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406103831] [2023-08-30 07:17:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:17:08,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:08,811 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:17:08,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:17:08,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:17:08,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:17:09,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 07:17:09,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:09,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 07:17:09,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:17:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:17:09,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:17:10,639 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:17:10,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-08-30 07:17:11,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:17:11,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2023-08-30 07:17:17,513 WARN L222 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 117 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:17:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:17:19,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:19,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406103831] [2023-08-30 07:17:19,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406103831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:17:19,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:17:19,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 07:17:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114631751] [2023-08-30 07:17:19,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:17:19,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:17:19,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:19,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:17:19,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=373, Unknown=7, NotChecked=0, Total=462 [2023-08-30 07:17:23,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:17:26,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 333 [2023-08-30 07:17:26,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 129 transitions, 990 flow. Second operand has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:26,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:26,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 333 [2023-08-30 07:17:26,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:55,008 INFO L130 PetriNetUnfolder]: 51043/87699 cut-off events. [2023-08-30 07:17:55,008 INFO L131 PetriNetUnfolder]: For 172532/172532 co-relation queries the response was YES. [2023-08-30 07:17:56,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325543 conditions, 87699 events. 51043/87699 cut-off events. For 172532/172532 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 725233 event pairs, 1760 based on Foata normal form. 264/87963 useless extension candidates. Maximal degree in co-relation 325462. Up to 20813 conditions per place. [2023-08-30 07:17:56,809 INFO L137 encePairwiseOnDemand]: 321/333 looper letters, 213 selfloop transitions, 100 changer transitions 68/381 dead transitions. [2023-08-30 07:17:56,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 381 transitions, 3075 flow [2023-08-30 07:17:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 07:17:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 07:17:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2836 transitions. [2023-08-30 07:17:56,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32755832755832753 [2023-08-30 07:17:56,814 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2836 transitions. [2023-08-30 07:17:56,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2836 transitions. [2023-08-30 07:17:56,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:56,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2836 transitions. [2023-08-30 07:17:56,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 109.07692307692308) internal successors, (2836), 26 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:56,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:56,825 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:56,825 INFO L175 Difference]: Start difference. First operand has 180 places, 129 transitions, 990 flow. Second operand 26 states and 2836 transitions. [2023-08-30 07:17:56,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 381 transitions, 3075 flow [2023-08-30 07:18:10,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 381 transitions, 2806 flow, removed 75 selfloop flow, removed 9 redundant places. [2023-08-30 07:18:10,545 INFO L231 Difference]: Finished difference. Result has 209 places, 193 transitions, 1650 flow [2023-08-30 07:18:10,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1650, PETRI_PLACES=209, PETRI_TRANSITIONS=193} [2023-08-30 07:18:10,546 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2023-08-30 07:18:10,546 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 193 transitions, 1650 flow [2023-08-30 07:18:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:10,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:10,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:10,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:18:10,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:10,747 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:18:10,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash -268424735, now seen corresponding path program 3 times [2023-08-30 07:18:10,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:10,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725051193] [2023-08-30 07:18:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:18:10,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:10,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:10,749 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:18:10,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 07:18:10,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:18:10,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:18:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 07:18:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:18:11,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:18:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:18:12,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:18:13,064 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:18:13,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-08-30 07:18:13,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:18:13,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2023-08-30 07:18:20,030 WARN L222 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 118 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:18:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:18:21,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725051193] [2023-08-30 07:18:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725051193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:18:21,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:18:21,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 07:18:21,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022256374] [2023-08-30 07:18:21,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:18:21,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 07:18:21,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:21,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 07:18:21,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=377, Unknown=3, NotChecked=0, Total=462 [2023-08-30 07:18:29,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 333 [2023-08-30 07:18:29,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 193 transitions, 1650 flow. Second operand has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:29,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:29,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 333 [2023-08-30 07:18:29,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:19:02,356 INFO L130 PetriNetUnfolder]: 59887/102923 cut-off events. [2023-08-30 07:19:02,356 INFO L131 PetriNetUnfolder]: For 488540/488540 co-relation queries the response was YES. [2023-08-30 07:19:04,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488970 conditions, 102923 events. 59887/102923 cut-off events. For 488540/488540 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 862860 event pairs, 3564 based on Foata normal form. 264/103187 useless extension candidates. Maximal degree in co-relation 488880. Up to 25608 conditions per place. [2023-08-30 07:19:04,586 INFO L137 encePairwiseOnDemand]: 321/333 looper letters, 207 selfloop transitions, 160 changer transitions 71/438 dead transitions. [2023-08-30 07:19:04,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 438 transitions, 4338 flow [2023-08-30 07:19:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 07:19:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 07:19:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2829 transitions. [2023-08-30 07:19:04,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3267498267498268 [2023-08-30 07:19:04,592 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2829 transitions. [2023-08-30 07:19:04,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2829 transitions. [2023-08-30 07:19:04,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:19:04,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2829 transitions. [2023-08-30 07:19:04,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 108.8076923076923) internal successors, (2829), 26 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:04,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:04,602 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:04,602 INFO L175 Difference]: Start difference. First operand has 209 places, 193 transitions, 1650 flow. Second operand 26 states and 2829 transitions. [2023-08-30 07:19:04,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 438 transitions, 4338 flow [2023-08-30 07:19:36,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 438 transitions, 3898 flow, removed 185 selfloop flow, removed 8 redundant places. [2023-08-30 07:19:36,276 INFO L231 Difference]: Finished difference. Result has 241 places, 259 transitions, 2670 flow [2023-08-30 07:19:36,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2670, PETRI_PLACES=241, PETRI_TRANSITIONS=259} [2023-08-30 07:19:36,276 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 190 predicate places. [2023-08-30 07:19:36,276 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 259 transitions, 2670 flow [2023-08-30 07:19:36,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:36,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:19:36,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:19:36,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:19:36,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:19:36,478 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:19:36,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:19:36,479 INFO L85 PathProgramCache]: Analyzing trace with hash 627316799, now seen corresponding path program 4 times [2023-08-30 07:19:36,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:19:36,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328519431] [2023-08-30 07:19:36,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:19:36,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:19:36,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:19:36,480 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:19:36,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 07:19:36,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:19:36,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:19:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:19:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:19:36,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2023-08-30 07:19:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:19:37,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:19:37,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:19:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:19:38,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:19:38,722 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_806 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_805 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (bvadd (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_805) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_806) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) c_~d~0) c_~W~0)) is different from false [2023-08-30 07:19:39,193 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:19:39,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 435 treesize of output 378 [2023-08-30 07:19:39,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 37 [2023-08-30 07:19:40,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:19:40,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 32 [2023-08-30 07:19:57,025 WARN L222 SmtUtils]: Spent 16.21s on a formula simplification. DAG size of input: 159 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:19:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:19:58,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:19:58,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328519431] [2023-08-30 07:19:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328519431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:19:58,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:19:58,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-08-30 07:19:58,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142606289] [2023-08-30 07:19:58,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:19:58,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 07:19:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:19:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 07:19:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=506, Unknown=3, NotChecked=46, Total=650 [2023-08-30 07:19:59,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 333 [2023-08-30 07:19:59,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 259 transitions, 2670 flow. Second operand has 26 states, 26 states have (on average 92.76923076923077) internal successors, (2412), 26 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:59,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:19:59,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 333 [2023-08-30 07:19:59,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:20:12,277 WARN L222 SmtUtils]: Spent 7.52s on a formula simplification. DAG size of input: 93 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:20:30,931 WARN L222 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 93 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:20:44,816 WARN L222 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 95 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:20:52,736 WARN L222 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 95 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:21:02,024 WARN L222 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 69 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:21:13,143 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 79 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:21:42,238 INFO L130 PetriNetUnfolder]: 80479/137419 cut-off events. [2023-08-30 07:21:42,238 INFO L131 PetriNetUnfolder]: For 1176832/1176832 co-relation queries the response was YES. [2023-08-30 07:21:45,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763982 conditions, 137419 events. 80479/137419 cut-off events. For 1176832/1176832 co-relation queries the response was YES. Maximal size of possible extension queue 1302. Compared 1198422 event pairs, 528 based on Foata normal form. 1584/139003 useless extension candidates. Maximal degree in co-relation 763880. Up to 27897 conditions per place. [2023-08-30 07:21:45,797 INFO L137 encePairwiseOnDemand]: 315/333 looper letters, 269 selfloop transitions, 334 changer transitions 50/653 dead transitions. [2023-08-30 07:21:45,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 653 transitions, 7490 flow [2023-08-30 07:21:45,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 07:21:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 07:21:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 5073 transitions. [2023-08-30 07:21:45,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29296604296604295 [2023-08-30 07:21:45,806 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 5073 transitions. [2023-08-30 07:21:45,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 5073 transitions. [2023-08-30 07:21:45,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:21:45,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 5073 transitions. [2023-08-30 07:21:45,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 97.5576923076923) internal successors, (5073), 52 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:45,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 333.0) internal successors, (17649), 53 states have internal predecessors, (17649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:45,826 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 333.0) internal successors, (17649), 53 states have internal predecessors, (17649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:45,826 INFO L175 Difference]: Start difference. First operand has 241 places, 259 transitions, 2670 flow. Second operand 52 states and 5073 transitions. [2023-08-30 07:21:45,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 653 transitions, 7490 flow [2023-08-30 07:24:15,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 653 transitions, 6752 flow, removed 212 selfloop flow, removed 12 redundant places. [2023-08-30 07:24:15,408 INFO L231 Difference]: Finished difference. Result has 298 places, 431 transitions, 4979 flow [2023-08-30 07:24:15,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4979, PETRI_PLACES=298, PETRI_TRANSITIONS=431} [2023-08-30 07:24:15,409 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 247 predicate places. [2023-08-30 07:24:15,409 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 431 transitions, 4979 flow [2023-08-30 07:24:15,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 92.76923076923077) internal successors, (2412), 26 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:15,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:24:15,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:24:15,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 07:24:15,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:24:15,613 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-30 07:24:15,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:24:15,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1989394726, now seen corresponding path program 5 times [2023-08-30 07:24:15,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:24:15,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428384651] [2023-08-30 07:24:15,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:24:15,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:24:15,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:24:15,615 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:24:15,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 07:24:15,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 07:24:15,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:24:15,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:24:15,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:24:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:24:16,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:24:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:24:16,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:24:16,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428384651] [2023-08-30 07:24:16,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428384651] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:24:16,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:24:16,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 07:24:16,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781489202] [2023-08-30 07:24:16,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:24:16,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:24:16,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:24:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:24:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:24:17,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 07:24:17,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 431 transitions, 4979 flow. Second operand has 10 states, 10 states have (on average 139.2) internal successors, (1392), 10 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:17,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:24:17,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 07:24:17,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:24:41,267 INFO L130 PetriNetUnfolder]: 54910/99489 cut-off events. [2023-08-30 07:24:41,268 INFO L131 PetriNetUnfolder]: For 1121644/1127399 co-relation queries the response was YES. [2023-08-30 07:24:45,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684183 conditions, 99489 events. 54910/99489 cut-off events. For 1121644/1127399 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 918163 event pairs, 17228 based on Foata normal form. 2567/99878 useless extension candidates. Maximal degree in co-relation 684069. Up to 84884 conditions per place. [2023-08-30 07:24:45,625 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 461 selfloop transitions, 13 changer transitions 43/570 dead transitions. [2023-08-30 07:24:45,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 570 transitions, 7526 flow [2023-08-30 07:24:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:24:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:24:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1141 transitions. [2023-08-30 07:24:45,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283033033033033 [2023-08-30 07:24:45,629 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1141 transitions. [2023-08-30 07:24:45,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1141 transitions. [2023-08-30 07:24:45,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:24:45,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1141 transitions. [2023-08-30 07:24:45,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.625) internal successors, (1141), 8 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:45,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:45,633 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:24:45,633 INFO L175 Difference]: Start difference. First operand has 298 places, 431 transitions, 4979 flow. Second operand 8 states and 1141 transitions. [2023-08-30 07:24:45,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 570 transitions, 7526 flow Killed by 15